Despite EastEnders having a tradition of tackling difficult social issues, from domestic violence to HIV, and Brookside having addressed child sex abuse 15 years ago with the Jordaches, the BBC soap came under fire from those who felt it inappropriate for EastEnders to focus on the subject - or perhaps they didn't want reminding that most abuse happens in the home. Thankfully EastEnders persevered, and last night Whitney dropped her bombshell. Tonight, then, comes the detonation, and cracking performances from Shona McGarty as Whitney and Patsy Palmer as Bianca, who hurtles from obliviousness to belligerent disbelief to a devastated, cold comprehension.

Natural World8pm, BBC2

Save the planet - drink more wine. It does beat camping out on an airport runway. And so to Portugal, where the world gets much of its cork from, sustainably stripped from trees and turned into not just wine bottle stoppers but also tiles, fishing floats and characters in Survivors. As well as supporting an extraordinary eco-system, from butter-flies to vultures, the cork also buoys up local farmers threatened by the rise of the metal screw-top and plastic stoppers. A strangely relaxing examination of an environment in jeopardy.

Horizon9pm, BBC2

One in 30 of the British population used to be afflicted by allergies. Now it's one in three. As that rise is part of a global trend, Horizon goes from Essex to Barbados in an attempt to find the cause, with pollution, diet and genetics all in the frame. A fascinating, worry-ing film that also dares to suggest that allergies may be psychosomatic. Imagine that.

Country House Rescue9pm, Channel 4

Heretofore Five's Hotel Inspector, Ruth Watson defects to Channel 4 to offer advice to owners of stately homes. Fifteen years after they restored Cothay Manor in Somerset, Alastair and Mary-Anne are still perched precariously on the edge of their money pit, pouring in the pounds and wondering how much more they can afford. Though the pair may elicit some sympathy - the place takes a heap to heat and is also a bugger to dust - those sliding into negative equity on less-than-expansive mansions may wish to watch CSI: Miami instead.